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Journal Article A 22GHz Cascode CMOS VCO Using Frequency Doubler
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Authors
Bong Hyuk Park, Seung Sik Lee, Song Cheol Hong, Sang Sung Choi
Issue Date
2007-11
Citation
Microwave and Optical Technology Letters, v.49, no.11, pp.2870-2873
ISSN
0895-2477
Publisher
John Wiley & Sons
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1002/mop.22857
Project Code
07MH1700, Development of UWB Solution for High Speed Multimedia Transmission, Sangsung Choi
Abstract
This paper presents a fully integrated cascode CMOS LC VCO using frequency doubler for oscillating at 22 GHz band. A symmetrical cascode coupling topology is implemented with negative conductance scheme for increasing the quality factor and output swing. Therefore, this architecture improves the phase noise characteristic in 0.18 μm CMOS technology. In order to oscillate at 22 GHz band the frequency doubler (clipper) is used. The measured phase noise is -102.4 dBc/Hz at the I MHz offset frequency. The tuning range of 1.32 GHz is obtained with the control voltage from 0.5 to 1.6 V. The current consumption of the VCO and the frequency doubler has 11.8 mA from 1.8 V supply. © 2007 Wiley Periodicals, Inc.
KSP Keywords
CMOS Technology, CMOS VCO, Cascode CMOS, Coupling topology, Current consumption, Frequency doubler, Fully integrated, GHz band, LC voltage controlled oscillator(LC-VCO), Noise characteristics, Output swing